Investigation of Organic Soil Reinforced with Single Stone Columns by Model Experiments

9th International Black Sea Coastline Countries Scientific Research Conference, Ankara, Türkiye, 10 - 11 Ağustos 2023, ss.184-194

In geotechnical engineering, organic soils have characteristic features such as excessive

settlement and low bearing capacity. When the studies in the literature on organic soils are

examined, soft soils were prepared in the model test box in the laboratory environment by

considering the conditions in the field or were used by taking small samples. It is impossible

to fully model the land with sample preparation in the laboratory environment. In this context,

model experiments were carried out on undisturbed organic soils taken from the field as 75

cm x 75 cm x 45 cm with a new block sampling technique developed by the study's authors.

In the second step, organic soils in large-scale crates were reinforced with single stone

columns in the laboratory environment. Finally, organic soils with and without individual

stone columns were modeled and analyzed in Plaxis 2D program. In this study, in the model

experiments with single and group columns, it was seen that the stone column application

increased the bearing capacity of organic soil by 2.0 times. The numerical analysis results

made with the Plaxis 2D program were approximately 12% lower than the model test results.

The results show that organic soils can be effectively improved with stone columns, affecting

the soil behavior and the carrying capacity of the disturbance condition in the model

experiments.